Heater for vehicles and the like



June 10, 1930., 5, J v, BOVEY 1,762,466

HEATER FOR VEHICLES AND THE LIKE Filed Jan. 25. 1926 umn of air through separate columns or.

Patented June 1 10, 1930 UNITED] STATES. PATENT OFFICE SIDNEY J. V BOVEY, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO METALCRAFT HEATER CORPORATION, OF GRAND RAPIDS, MICHIGAN, A COR- PORA'IION OF MICHIGAN HEATER FOR VEHICLES AND THE LIKE Application filed January 25, 1926. Serial No. 83,508.

This invention relates to a heater and also to a method for heating air for vehicles and the like.

One of the objects of the present invention is to provide an improved form of heater for avehicle which is simple in construction and ehicientin operation.

A further object of the invention is to provide an improved method of passing a colbodies of exhaust gases and whereby the column of air is rapidly heated and maintained at a high temperature so as to produce avery efficient heater for a vehicle.

A still further object of the invention is to provide an improved heating device which is adapted tobe mounted on the exhaust gas pipe of a vehicle in which a tubular column of fresh air is passed over a portion of the exhaust .gas pipe and a separate and distinct tubular column of exhaust gas is directed to surround the tubular-column of heated air in such a manner that the tubular column of exhaust gas not only expedites the heating of the fresh air but forms an insulation for maintaining the heated air at a high temperature prior to the heated fresh air being passed into the body of the car.

A still further object of my invention is to provide an improved form of heating register which is adapted to be mounted in one of the seats adjacent the floor board and to extend substantially across the seat-of the car.

; These andother objects are accomplished by providing a construction and an arrangement of .the various parts in the manner. hereinafter described and particularlypointed out in the appended claims.

Referring to the drawings, Fig. l'is a fragmentary cross sectional view taken on a vertical plane passing through the longitudinal center of the car bodv showin my improved heating device mounted therein.

F ig. 2'is a cross sectional view taken on the 7 lines 2-2 of Fig. 1'.

Fig. 3 is an enlarged perspective view showing the construction of my'imp'roved form of heating register, and Fig 4 is a cross sectional view taken on the line of Fig. 1. p I

One of the essential features of my i1nproved invention is the provision of an improved method and apparatus by means of which I pass a tubular column or body of fresh air over a portion of the exhaust gas pipe of the vehicle and surround this tubular column of air by another tubular column of exhaust gas which is tapped from the exhaust gas pipe and thereby produce an additional heating element which also serves to insulate the tubular column of heated or fresh air from the cooling effect of the atmosphere.

In illustrating one embodiment of my in vention I have shown the same in connection with a fragmentary'portion 10 of the conventional form of vehicle body which comprises a main floor 11 and dash board 12- and also front and rear seats 13 and 14, respectively. The vehicle is provided with the usual main frame or chassis not shown and conventional form of internal combustion engine 15. -The engine 15 is provided with the usual radiator fan 16 and gas exhaust conduit which includes a manifold 17 and exhaust gas pipe 18. The rear end of the exhaust gas pipe 18 is provided with theconventional form of muffler 19. My improved heating device is preferably mounted on the horizontally extending portion 20 of the exhaust gas pipe 18 and comprises a tubular casing 21 which is of relatively larger diameter than the diameter of the exhaust gas pipe 18. The opposite ends of the casing 21 are secured to end casing members 22 which have a centrally disposed bore adapted to receive the exhaust gas pipe 18 and are secured against displacement onthe exhaust gas pipe 18 by set screws 23. Surrounding the tubular casing 21 and p of relatively larger diameter than the casing 21 is a second or outer casing 24. The outer casing 24 is providedwith end members 25 which are in the form of annular channels and secure the outer cas ing 24 to the inner casing 21'. Theseend members 22 and 25 are secured to the respective casings in any well known manner. so as to form substantially air tight compare ments between the casings. Inorder to fur- "ther insulate the outer casing from the cold outside atmosphere'I provide an inner asbes- 100 tos lining 26 secured to the inner wall thereof in any well known manner. The fresh air to be heated andconveyed into the body of the car or vehicle is derived by positioning a funnel-shaped member 27 adjacent the ra diator'{-fan 16 bymeans of av clip or bracket 28. Connectedwith funnel member 27 and extending rearwardly therefrom is a tubular conduit 29'which has its lower and rear end connected 'byineans of a suitable elbow 30 into the compartment within the casing 21 as shown at 31. In other words, the fresh air is conveyed into the heated air chamber 32 which is formed between the'outside of the exhaust gas pipe and the inner wall of the casing 21. It will be noted that this connection is made through my improved form of heating device on the lower side thereof and adjacent the forward end. After the air is heated it is passed from within the heating chamber 32 outthrough an elbow 33 which has its inner end connected or in communication with the casing 21 adjacent the upper and rear end thereof. Connected to the rearwardly extending portion of the elbow 33 is a rearwardly extending conduit 34. The rear end of the conduit 34 is bent upwardly as shown at 35 and communicates with my improved form of register 36 which is mounted in one of the seats 14 of the ve- "hicle adjacent the floor board and which extends substantially across the seat of the car or vehicle.

This register 36 is relatively flat in construction and has its forward end provided with a screen or perforated plate 37 for permitting the heated air to be discharged therethrough. The conduit 34 is provided with the conventional form of fly valve 38 and control chain 39. y

The essential feature of my improved heating apparatus comprises the means whereby a certain portion of the exhaust gases are deflected from within the exhaust gas pipe to form a tubular column around the heating I chamber to expedite the heating of the fresh air and to form an insulation for the column of heated air. This comprises a tubular-elbow 40 which is tapped into a portion of the exhaust gas pipe 18 asshown at 41. The lower end. of the elbow 40 is pointed as shown at 42 and extends into the exhaust gas 18 a short distance so as to form a deflector so as to cause a portion of the exhaust gases to pass through the elbow. The elbow is socured in position on the exhaust gas pipe by a suitable: clamp-and bracket connection as shown at 43. The rear end of the elbow is' .eonnected or in communication with the compartment 44 between the outer casing 24 and the casing 21 by means of another elbow 45.

The forward end of the elbow 45'telescopieally receives one end of the elbow 40 and 1 is.detachablysecured thereto by means of a set screw 46. The exhaust gases'passing into pipe gas into said gas exhaust condiiit.

the chamber or compartment 44 are discharged achacent the lower and rear end thereof by means of another elbow 47 which is secured to the outer casing 24 at one end and has its other end telescopically receiving a second elbow 48, which in turn has its upper end discharging into the exhaust gas pipe 18 as shown at 49. The elbow 48 is secured in position by means of a clamping bracket 50 which surrounds the exhaust gas pipe adjacent the elbow.

From the above it will be noted that as the exhaust gases are being discharged through the conduit or pipe 18 some of the exhaust gases will be deflected through the elbow 40 on the forward end of my improved heating device and conveyed through the elbow 40 and thence through the elbow 45 into the tubular chamber 44 to the rear of said cliamveyed by the fan belt-.16 through the funnel member 27 into the conduit 29 from where it will pass by means of the elbow 30 into the forward end of the tubular chamber 32 and after the same has been heated by means of the hot gases within the exhaust gas pipe 18 and by means of the heated exhaust gases within the chamber 44 it will pass through the elbow 33 whichis connectedat the rear end of the heating chamber 32 through the conduit 34 into the register 36 beneath the seat of the car. By this arrangement it will be readily seen that I have provided an im-' proved method and apparatus whereby the fresh air is rapidly heated by reason of the large heating area afforded by means of my apparatus and by reason of the exhaust gases forming a tubular column around the air being heated, the heated air is efficiently insulated from the cold atmosphere surround ing' the heating apparatus.

lVhile in the above specification I have described one embodiment which my invention may assume in practice it will of course be understood that the same is capable of modification and that modification may be made without departing from the spirit and scope of the invention as expressed in the following claims.

\Vhat I claim as my invention and desire to secure by Letters Patent is:

1. In an internal combustion engine. having a {continuous exhaust gas' conduit extending rearwardly from said engintaineans for confining air to be heated in a tubular column about a portion of said exhaust gas conduit fllneans for conveyinga portion of the exhaust gases in a tubular column around said tubular column of air, and means for conveying the tubular column of exhaust 2. In an internal combustion engine,hav-

ing an exhaust gas conduit extending rear- 3 wardly from said engine, a casing mounted on a portion of said exhaust gas conduit adapted to receive air at one end thereof and discharge the air at" the other end thereof,

said gas conduit extending entirely through said casing, and asecond casing embracing said first named casing and adapted to withdraw a portion of the exhaust gas in advance.

of said casing whereby the airwithin the said first named casing is heated by the exhaust gas within said second casing.

3. In an internal combustion engine haying an exhaust gas conduit extending rear- .wardly from said engine, a casing surrounding a portion of said exhaust gas conduit forming an air heating chamber between said casing and said exhaust gas, conduit, said gas conduit extending entirely through. said casing, a second casing surrounding the body of said first-named casing forming an exhaust gas chamber therebetween, and

means for diverting a portion of the exhaust gas at a point ahead of said casing and passmg the same exhaust gas to said last-named chamber, whereby the air in said air heating chamber is heated by saidexhaust gas and insulated from the outside atmosphere.

4. In an internal combustion engine, hav ing an exhaust gas conduit extending rearwardly therefrom, a casing surrounding a portion of said exhaust gas conduit forming a tubular air heating chamber therein, a second casing surrounding said first-named casing forming a tubular exhaust gas chamber surrounding said first-named tubular chamber, and conduits for communicating both ends of said exhaust gas tubular ,chamher with said gas exhaust conduit, whereby l n I u i a portion of said exhaust gas conduit form- .the air in said heating chamber is heated by the exhaust gases within said exhaust con-. .duit and within said exhaust gas tubular chamber. v

' 5. In an internal combustion engine, having an exhaust gas conduit extending rearwardly from sald engine, acasing embracing ing a tubular air heating chamber about said. ex'haust gas conduit, asecond casing mounted concentrically with said first-named casing forminga tubular exhaust gas chamber about said first-named chamber, an asbestos lining 1 mounted within .said last-named casing, and

means including elbow connections for conveying a portion of the exhaust gases passing through sa-idexhaust gas conduits into said exhaust gas chamber, whereby the air in said airhea-ting chamber is heated by the exhaust gases and insulated from the outside atmos ph'ere. a

= ing an exhaust gas conduit extending rear-' 6. In an lnternal combustion engine, havwardly therefrom, a casing mounted concentrically with a portion of said exhaust gas extending into said exhaust gas conduit and connected with said -second-named casing for conveying a portion of the exhaust gas from said exhaust gas conduit into said secondnamed casing, and a conduit connecting said second-named casing with saidexhaust gas said inner casing forming a heating chamber between said inner casing and said exhaust gas conduit,an air inlet to and an outlet from said heating chamber, and means for diverting a portion of the exhaust gas passing through said exhaust gas conduit into said exhaust gas chamber for heating the air, passing through said heating chamber.

8. A heater r'or motor vehicles comprising an outer casing and an inner casing forming an exhaust gas chamber therebetween, an exhaust gas conduit extending entirely through said inner casing forming a heating chamber between said inner casing and said exhaust gas conduit, and an air inlet to and an outlet from said heating chamber, a separate conduit connecting the exhaust gas conduit with said exhaust gas chamber through which a portion of the gas is diverted into said exhaust gas chamber and a separate conduit connecting said exhaust gas chamber with said exhaust gas conduit for discharging the exhaust gas from said exhaust gas chamber into said exhaust gas conduit, whereby the air passing through said heating chamber is heated.

9. A heater for motor vehicles comprising an outer cylindrical casing and an inner cylindrical casing forming an exhaust gas chamwhereby the air passing through saidheat ing chamber is heated.

In testimony whereof I have signed my name to thisspecification, on this 8th day of January, A. D1926.

SIDNEY J. .V. BOVEY. T

conduit, a second casing mounted concen trically with said first-named casing, means 

